Trait Buildable

pub trait Buildable: Sized
where
    Self: BoulderBase,
{
    type Builder: Builder<Result = Self>;

    // Required method
    fn builder() -> Self::Builder;
}

A type that has an associated default Builder.

This trait is implemented via the Buildable derive macro. It cannot be directly implemented because the library itself provides a blanket implementation from a more complex underlying trait MiniBuildable, which is not currently documented.

This restriction may be removed in a future version; much of the complexity in this module stems from lacking generic associated types on stable.

Required Associated Types

type Builder: Builder<Result = Self>

A default choice of Builder for this type.

Required Methods

fn builder() -> Self::Builder

Create a new default builder.

Example

use boulder::{Builder, Buildable};

#[derive(Buildable)]
struct Foo {
   a: i32
}

let b = Foo::builder();
let f = b.build();
assert_eq!(f.a, 0);

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<T> Buildable for T

where T: BoulderBase + MiniBuildable<<T as BoulderBase>::Base>,

type Builder = <T as MiniBuildable<<T as BoulderBase>::Base>>::Builder